As you know from replacing light bulbs, there is a large, thin, frosted glass envelope in the familiar light bulb shape. |
An incandescent light bulb contains a thin wire filament that glows hot when an electric current is run through it. |
Lewis Latimer, the son of runaway slaves, became an electrical engineer and invented an inexpensive process for making light bulb filaments. |
There's a light bulb glowing over my head that is brighter than the flaring of a sour gas well. |
Some scientific breakthroughs, like Edison's invention of the light bulb, are purposeful and planned. |
Don't embark on any ambitious DIY projects until you have seen how much mess he makes changing a light bulb. |